Saving work as is

Appointments and Invoices
Merge branch 'master' of https://github.com/HospitalRun/frontend
More changes for appointments

Also changed the Meta name
Merge branch 'master' of https://github.com/HospitalRun/frontend
Label change for Patients
Merge
Merge branch 'master' of https://github.com/HospitalRun/frontend
Adding the appointment and visit models